反应详情

To a mixture of 2-acetamidoacrylic acid (10.3 g, 80.0 mmol) and K2CO3 (10 g, 72.5 mmol) in N,N-dimethylformamide (50 mL) was added benzyl bromide (8.7 ml, 72.5 mmol) at room temperature then stirred at room temperature for 3 hours. The mixture was partitioned between ethyl acetate and water (50 mL, 1:1), the aqueous layer was extracted with ethyl acetate (2×45 mL). The combined organic layers was washed with brine (2×25 mL), dried (MgSO4), filtered and concentrated under reduced pressure to provide titled compound. MS (ESI(+)) m/e 220(M+H)+; 1H NMR (300 MHz, DMSO-d6) δ 9.37 (s, 1H), 7.43-7.30 (m, 5H), 6.13 (s, 1H), 5.70 (s, 1H), 5.23 (s, 2H), 2.01 (s, 3H).

1. customThe mixture was partitioned between ethyl acetate and water (50 mL, 1:1)
2. extractionthe aqueous layer was extracted with ethyl acetate (2×45 mL)
3. washThe combined organic layers was washed with brine (2×25 mL)
4. dry with materialdried (MgSO4)
5. filtrationfiltered
6. concentrationconcentrated under reduced pressure